[PATCH] net/mlx5: fix unsupported port ID action

[Ivan Malov]

On Thu, 7 Aug 2025, Maayan Kashani wrote:

> When dv_flow_en=2, the port ID action is not supported.
> Although a rule can be created successfully in non-template mode,
> the specified action will be silently ignored and not applied.
>
> To prevent this ambiguous behavior, explicitly return an error
> when a port ID action is used with dv_flow_en=2,
> and recommend using a represented port action instead.
>
> Fixes: f1fecffa88df ("net/mlx5: support Direct Rules action template API")
> Cc: stable at dpdk.org
>
> Signed-off-by: Maayan Kashani <mkashani at nvidia.com>
> Acked-by: Dariusz Sosnowski <dsosnowski at nvidia.com>

Acked-by: Ivan Malov <ivan.malov at arknetworks.am>

> ---
> drivers/net/mlx5/mlx5_flow_hw.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/mlx5/mlx5_flow_hw.c b/drivers/net/mlx5/mlx5_flow_hw.c
> index 6dc16f80d32..58d4882cb96 100644
> --- a/drivers/net/mlx5/mlx5_flow_hw.c
> +++ b/drivers/net/mlx5/mlx5_flow_hw.c
> @@ -2913,6 +2913,10 @@ __flow_hw_translate_actions_template(struct rte_eth_dev *dev,
> 		case RTE_FLOW_ACTION_TYPE_END:
> 			actions_end = true;
> 			break;
> +		case RTE_FLOW_ACTION_TYPE_PORT_ID:
> +			DRV_LOG(ERR, "RTE_FLOW_ACTION_TYPE_PORT_ID action is not supported. "
> +				"Use RTE_FLOW_ACTION_TYPE_REPRESENTED_PORT instead.");
> +			goto err;
> 		default:
> 			break;
> 		}
> @@ -7644,7 +7648,11 @@ flow_hw_parse_flow_actions_to_dr_actions(struct rte_eth_dev *dev,
> 		case MLX5_RTE_FLOW_ACTION_TYPE_MIRROR:
> 			at->dr_off[i] = curr_off;
> 			action_types[curr_off++] = MLX5DR_ACTION_TYP_DEST_ARRAY;
> -				break;
> +			break;
> +		case RTE_FLOW_ACTION_TYPE_PORT_ID:
> +			DRV_LOG(ERR, "RTE_FLOW_ACTION_TYPE_PORT_ID action is not supported. "
> +				"Use RTE_FLOW_ACTION_TYPE_REPRESENTED_PORT instead.");
> +			return -EINVAL;
> 		default:
> 			type = mlx5_hw_dr_action_types[at->actions[i].type];
> 			at->dr_off[i] = curr_off;
> -- 
> 2.21.0
>
>